import axios from 'axios'

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
    // 超时
    timeout: 10000
})

// request拦截器
service.interceptors.request.use(config => {
    // get请求映射params参数
    if (config.method === 'get' && config.params) {
        let url = config.url + '?' + config.params;
        url = url.slice(0, -1);
        config.params = {};
        config.url = url;
    }
    return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = res.data.msg
    // 二进制数据则直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
        return res.data
    }
    if (code === 401) {
        return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === 500) {
        return Promise.reject(msg)
    } else if (code === 601) {
        return Promise.reject(new Error(msg))
    } else if (code !== 200) {
        return Promise.reject(msg)
    } else {
        return Promise.resolve(res.data)
    }
},
    error => {
        let { message } = error;
        if (message == "Network Error") {
            message = "后端接口连接异常";
        } else if (message.includes("timeout")) {
            message = "系统接口请求超时";
        } else if (message.includes("Request failed with status code")) {
            message = "系统接口" + message.substr(message.length - 3) + "异常";
        }
        return Promise.reject(error)
    }
)

export default service
